HEATING AND AIR CONDITIONING
TABLE OF CONTENTS
page page
DESCRIPTION AND OPERATION
BLOWER MOTOR .........................2
BLOWER MOTOR RELAY ...................2
BLOWER MOTOR RESISTOR................3
BLOWER MOTOR SWITCH..................4
COMPRESSOR ...........................4
COMPRESSOR CLUTCH....................4
COMPRESSOR CLUTCH RELAY..............5
CONDENSER.............................5
ELECTRONIC CYCLING CLUTCH SWITCH ......5
EVAPORATOR COIL .......................6
EXPANSION VALVE........................6
FILTER-DRIER............................6
HEATER AND AIR CONDITIONER.............7
HEATER AND AIR CONDITIONER CONTROL ....8
HEATER CORE ...........................8
HIGH PRESSURE CUT-OFF SWITCH ..........8
HIGH PRESSURE RELIEF VALVE .............8
LOW PRESSURE CUT-OFF SWITCH...........9
REAR OVERHEAD AIR CONDITIONER .........9
REFRIGERANT ...........................9
REFRIGERANT LINES......................9
REFRIGERANT LINE COUPLERS ............10
REFRIGERANT OIL .......................10
REFRIGERANT SYSTEM SERVICE PORTS.....11
VACUUM CHECK VALVE...................11
VACUUM RESERVOIR ....................11
DIAGNOSIS AND TESTING
A/C PERFORMANCE ......................11
BLOWER MOTOR ........................15
BLOWER MOTOR RELAY ..................15
BLOWER MOTOR RESISTOR...............16
BLOWER MOTOR SWITCH.................17
COMPRESSOR ..........................17
COMPRESSOR CLUTCH COIL ..............18
COMPRESSOR CLUTCH RELAY.............18
ELECTRONIC CYCLING CLUTCH SWITCH
(Front Unit Only) .......................19
EXPANSION VALVE.......................19
HEATER-A/C CONTROL ...................20
HEATER PERFORMANCE ..................21
DUAL FUNCTION HIGH PRESSURE
SWITCH/HIGH PRESSURE CUT-OFF
SWITCH..............................22
LOW PRESSURE CUT-OFF SWITCH..........22
REFRIGERANT SYSTEM LEAKS.............23
REFRIGERANT SYSTEM SERVICE
EQUIPMENT...........................24
VACUUM SYSTEM .......................24
SERVICE PROCEDURES
REFRIGERANT OIL LEVEL .................28
REFRIGERANT RECOVERY.................28
REFRIGERANT SYSTEM CHARGE ...........28
REFRIGERANT SYSTEM EVACUATE..........28
REMOVAL AND INSTALLATION
SERVICE WARNINGS AND PRECAUTIONS ....29
B-PILLAR REFRIGERANT LINE .............31
BLOWER MOTOR ........................32
BLOWER MOTOR RELAY ..................34
BLOWER MOTOR RESISTOR...............35
COMPRESSOR ..........................37
COMPRESSOR CLUTCH...................38
COMPRESSOR CLUTCH RELAY.............41
CONDENSER............................41
DUCTS AND OUTLETS ....................43
ELECTRONIC CYCLING CLUTCH SWITCH .....48
EVAPORATOR COIL ......................48
EXPANSION VALVE.......................51
FILTER-DRIER...........................52
HEATER-A/C CONTROL ...................53
HEATER-A/C HOUSING....................54
HEATER-A/C HOUSING DOOR ..............57
HEATER CORE ..........................59
HIGH PRESSURE CUT-OFF SWITCH .........59
LIQUID LINE............................60
LOW PRESSURE CUT-OFF SWITCH..........62
MODE DOOR VACUUM ACTUATOR ..........62
REAR BLOWER MOTOR SWITCH ...........63
REAR OVERHEAD A/C UNIT................64
REFRIGERANT LINE COUPLER .............66
SUCTION AND DISCHARGE LINE ...........66
SUCTION LINE JUMPER ..................67
TEMPERATURE CONTROL CABLE ...........68
DN HEATING AND AIR CONDITIONING 24 - 1
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